Low menstrual flow after uterine evacuation may be caused by a variety of reasons, mainly uterine adhesion, low immunity, premature ovarian failure, etc. The causes should be clarified and then treated. Common causes and treatments 1, uterine adhesion: often incomplete adhesion or complete adhesion of the uterine cavity and other complications, resulting in a significant decrease in menstrual flow or amenorrhea, should be done in a timely manner to do a hysteroscopy, if there is indeed adhesion, the adhesion should be separated under the hysteroscopy of the tissue, and at the same time on the birth control ring, to avoid re-adhesion, but also supplemental oestrogen, such as oestradiol valerate, to promote the growth of the endometrium; 2, immune system Low immune system: The operation of uterus removal can cause damage to the body, which in turn leads to low immunity, manifested as weakness, physical weakness, low menstrual flow and other symptoms, after the operation, should pay attention to rest, strengthen the nutrition, can be diagnosis and treatment, under the guidance of the doctor, rational use of medication, such as deer fetus cream, the eight treasures of mother capsule, etc.; 3, premature ovarian failure: there can be low menstrual flow, menstrual cycle disorders, or amenorrhea symptoms, accompanied by hot flashes, sweating, flushing and other phenomena, should be performed vaginal ultrasound, vagina, or other symptoms, to avoid the endometrial growth. Phenomenon, should be vaginal ultrasound and blood hormone level measurement to confirm the diagnosis, can be used estrogen and progesterone replacement therapy, ovulation and immunotherapy. Precautions after purging surgery within one month prohibit coitus and pelvic bath, because the cervical opening is not yet completely closed, bacteria are easy to go up and cause infection in the pelvis, thus a series of gynecological inflammation, such as endometritis, tubalitis, etc., and even abdominal pain, lumbago, fever and other symptoms. After the operation, you should rest for two weeks, do not do heavy labor, and avoid cold, spicy and stimulating food in your diet.